Running DNS like an operator
Move DNS without downtime, protect it with DNSSEC, and debug resolution problems the way operators do.
- Advanced
- Level
- 3
- Lessons
- 6 min
- Study time
Course content
- 1. Zero-downtime DNS migrationsChanging nameservers or moving a site to new IPs doesn't have to cause an outage. The trick is planning around caches.2 min
- 2. DNSSEC explainedPlain DNS has no way to prove an answer is genuine. An attacker who can inject a forged response can send your visitors anywhere. DNSSEC adds signatures to fix that.2 min
- 3. Debugging DNS problemsMost "DNS is broken" reports are really one of a handful of problems. Work through them in order.2 min